G J Perry

Accuracy of color doppler velocity in the flow field proximal to a regurgitant orifice: implications for color doppler quantitation of valvular incompetence.

N C Nanda, N. Nanda, J. Myers, 1996, Ultrasound in medicine & biology.

Evaluation of aortic insufficiency by Doppler color flow mapping.

N C Nanda, N. Nanda, G. Perry, 1987, Journal of the American College of Cardiology.